pwm.h

用的avr icc 开发的atmega16的超声波测距仪模型。

#ifndef PWM_H
#define PWM_H
#ifdef PWM_C
void pwm_40MHz( unsigned char n);//40MHz SHOUT  PULSE, n==numbers for pulse
void pwm_30MHz( unsigned char n);
void pwm_20MHz( unsigned char n);
#else
extern void pwm_40MHz( unsigned char n);
extern void pwm_30MHz( unsigned char n);
extern void pwm_20MHz( unsigned char n);
#endif
#endif